PURPOSE: To observe the virtual image of information overlappingly with the front scenery by feeding the light from an information source to a light guiding plate under total reflection conditions, and extracting the light with a combiner made of a transmission type of reflection type hologram.
CONSTITUTION: A transmission type hologram 14 feeding the light from an information source 13 to a light guiding plate 10 under total reflection conditions is closely stuck near one end section of the light guiding plate at the position opposite to the information source 13 such as a speed meter. A combiner 11 made of a reflection type hologram is closely stuck near the other end section of the light guiding plate 10. The light sent from the information source 13 is fed to the light guiding plate 10 via the transmission type hologram 14 under total reflection conditions, it is totally reflected and proceeds in the light guiding plate 10, then it is extracted to the outside from the combiner 11 and sent to the eyes 12 of a driver. The driver can observe the virtual image 15 of the information source 13 overlappingly with the front scenery in front of the light guiding plate 10.
YAMAZAKI KOZO
ARITAKE TAKAKAZU
WATANABE REIKO
YAMAGISHI FUMIO
